Cap for hermetically-sealed jars.



Patented May l5, I900.

W. H. HONISS.

CAP F08 HEBMETIGALLY SEALED JARS.

(Application filed. Aug. 17, 1899.)

{No Model.)

llnrrsn STATES rricn.

\VILLIAM ll. IlONISS, OF HARTFORD, CONNECTICUT, ASSIGNOR OF TIIREF- FOURTHS TO lVILLlAM A. LORENZ, OF SAME PLACE, AND BARTLETT ARKELL, OF CANAJOHARIE, NEW YORK.

CAP FOR HERMETlCALLY-SEALED JARS.

SPECIFICATION forming part of Letters Patent No. 649,845, dated May 15,1900.

Application filed August 1'7. 1899. Serial No. 727,599. (No model.)

1/? (WI 707mm I OOYLGW'HI working in the full view of the operator, who Be it known that 1, WILLIAM H. HONIss, a is thereby enabled to detect any misfit or dis citizen of the United States of America, and placement of the gaskets or of the caps bea resident of Hartford, in the county of Hartfore subjecting the jars to the exhausting op- 5 ford and State of Connecticut, have invented eration. At the conclusion of that operation certain new and useful Improvements in Caps it is then only necessary to seal the air-ducts for Hermetically Sealed Jars, of which the by merely sliding the cap down over the comfollowing is a specification. pressed gasket far enough to carry the air- This invention is an improved cap for herducts into sealing contact therewith. The

10 metically sealing jars and cans of the class jars 5 shown in connection with these imcommonly employed for the preservation of proved caps 6 are provided with an annular food by the exclusion of air. groove 7, deep enough to form a permanent Figures 1 and :2 of the drawings are side seat for the gasket 8, adjacent to the mouth views in section, taken through the longitudiof the jar.

15 nal center of a jar, its gasket, and cap, Fig. The caps 6, which are preferably of metal, 1 showing the latter in the position occupied as usual, are each provided with a cylindrical by it during the air-expelling or exhausting rim 9, which fits tightly upon the outside of operation, while Fig. 2 shows the cap pushed the gasket to hold it in its compressed condidown to its sealing position. Fig. 3 is asimition. The upper portion of this cylindrical 2o lar sectional side view of a jar, its gasket, and rim is provided with one or more air-ducts, 7o cap, the latter being provided with a modiwhich in the preferred construction shown in fled form of air-duct and being here shown in Figs. 1 and 2 consist of perforations extendits exhausting position, similar to that of Fig. ing through the metallic rim, so as to come 1. Fig. l is a fragmentary plan view in secabove the gasket and communicate with the 25 tion, taken on the line 4 l of Fig. 3, showing interior of the jar when the cap is in its en':-

this modified form of duct. hansting position. (Shown in Fig. 1.)

Jars of this class are commonly sealed by The gasket may be compressed in its seat means of an annular gasket of rubber or simi- 7 upon the jar by any convenient extraneous lar yielding material, which is usually com means sufficient to enable the cylindrical rim 3o pressed against the outside of the neck of the 9 to be slipped over the gasket; but it is more jar by means of a metallic cap or else is exconvenient and expeditions to adapt the cap panded against the interior of the cap by the so that it may be employed to compress the neck of the jar. In either case this compresgasket to the condition shown in Fig. 1. To sion or expansion of the gasket to completely this end the lower portion of the rim is pro 5 seal the annular space between the cap and vided with an outwardlyflaring zone 10, the jar is ordinarily deferred until the 0011- which should be of an angle or taper suited clusion of the exhausting operation. In the to the size of the uncompressed gasket. customary procedure the caps and their gas By reason of changes of temperature and kets are placed more or less loosely upon for other causes operating during the lapse .ro their jars, and the latter are then transferred of time the gasket is liable to shrink away to a closed retort, from which the air is exfrom the cylindrical rim 9, and in order to hausted by means of a pump or similar appaenable the cap to follow up such ashrinkage ratus, the gaskets being compressed or exand maintain the integrity of the seal the uppanded to seal the jars at the completion of per portion of its rim 12 is slightly tapered 45 the exhausting operation and before the hit or flared, as shown in Figs. 1 and 2, so that 5 ter are removed from the retorts. In the apany contraction of the mouth of the jar or plication of the present invention this annushrinkage of the gasket will enable the cap lar space is tightly sealed before placing the to be pushed still farther down by external jars in the retorts, and this may therefore be atmospheric pressure from the position shown 50 done by hand or by any suitable apparatus in Fig. 2, thereby maintaining the seal. Ioo

The operation of exhausting and sealing jars provided with these improved caps is, as follows: The gasket is placed in the seat 7 and the fiarin g compressing-zone 10 of the cap is forced over the outside of the gasket to the position shown in Fig. 1, thereby completely sealing the annular space between the jar and cap, but leaving open the air duct or ducts 11. The jars thus prepared are placed .in a suitable exhausting-retort and subjected to the exhausting operation, at the conclusion of which the caps are pushed down to the position shown in Fig. 2, so as to seal the air-ducts, whereupon the jar may safely be removed from the retort.

The modification of the invention represented in Figs. 3 and 4t resides merely in the form of air-duct, therein shown to consist of grooves 15, which may be made byforming one or more outward corrugations 17 in the cap at the desired intervals. These corrugationsextendacross that portion of thesealing-zone 16 which rests in contact with the gasket 8, so as. tocommunicate with the jar interior when the cap is, in theexhaustin g position shown. in these figures. In, all other respects. the function and mode of Operation of thisform. of cap are the same asthosepre- Viously describe The. sealing-joint may be made upon the inside of a jar-neck by transferring the gasket-seat 7 to. the inner side of thewall and by reversiingv or. turning thecapst or 14 insideout and making them of correspondin glysmaller diameter.

I. claim as my invention- 1. A cap for hermetically-sealed jars, provided with a rim having a substantially-parallel cylindrical portion for sliding over and sealing a compressed gasket before and during the exhausting operation, and with an air-duct located in the cylindrical portion of the rim-for communicating with the interior of the jar when the cap is in its exhausting position, and adapted to be sealedby sliding the cylindrical portion of the cap downwardly over the compressed gasket.

2. A jar-cap provided with a flaring rim for compressing the gasket, a cylindrical seat for the compressed gasket and an air-duct located in the cylindrical seat and communicating with the interior of the jar above the gasket when the cap is in its exhausting position.

3. A jar-cap having an annular rim, comprising a flaringedge or zone for compressing the gasket, a cylindrical zone for sliding over the compressed gasket, and a conicallycontracted zone for following up the shrinkage of the gasket.

4. In combination with ajarprovidedwith an annular permanent seat for a, gasket, a cap therefor, having a flaring rim for compressing the gasket,"a. cylindrical Seat for re ceiving the compressed gasket from the flaring rim, and an air-duct located in the cylindrical seat, and communicating with theinterior of the jar above the gasket when the capis in its exhausting position.

Signed by me at Hartford, Connecticut, this 15th day of August, 1899.

WVILLIAM II. HONI SS'.

Witnesses:

JENNIE NELLIs CASE, J os. MERRrrT. 

